Knee and column milling and like machine



July 1935- 12. 'STUHLMACHER 2,007,314

KNEE AND COLUMN MILLING AND LIKE MACHINES Filed May 11, 1952 4 Sheets-Sheet l 1& P E Fig. 4

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KNEE AND COLUMN MILLING AND LIKE MACHINES Filed May 11, 1932 4 Sheets-Sheet 2 Fig 5 m f .25 l

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KNEE AND COLUMN MILLING AND LIKE MACHINES Fi led May 11, 1952 4 sheets-sheet 3 IW venfor:

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KNEE AND COLUMN MILLING AND LIKE MACHINES Filed May 11, 1932 4 Sheets-Sheet 4 DMeM/fflf: zz alaz rd lin /mailer Patented July 9, 1935 KNEE AND ooLUMN MILLING AND i .1 f .MACHINE.

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: Richard's tu hhnacher,- Siegmar, near Chemnitz, Germany,,assignor to Wanderer-Werke vorm. Winklhofer & Jaenicke A. G.', Schonau, near Chemnitz, Germany Application May- 11, 1932, Serial No. 610,719

. In Germany December 1, 1930 r The invention consists intheconstruction of the guiding devices on the' knee of a kneeand' column milling or like machine, by which the knee is reliablyand' rigidly supported. I I In previously known 'machines of thisty'pe, the

knee is guided on the column ofthe machine and,

if necessary, by-one or morepillars or supports disposedon the side opposite toi the column and connected withtheoverarm or 'the base plate or with bothof these members: Theknee is sufficiently supportedby these guides and co'nnections :to resist the/stresses and distortions setup in certain directions In.use,=however, stresses and distortions occur. due to the cutting pressure and the weight of'the woi'k indifferent working'positions in allithree directions inspace, that is, in three planeszatrightfangles toone "a swer. =It'is now found that, withheav'y workand machines with large cutting capacity,:the'previously known guiding and supporting devices. forthe knee do not provide suillcient rigidity inall directions in which the forces may act. This is more particularly marked for'for'ces and displacements in the horizontal plane. On that accountfin consc quehcei'of the bending setlup, eithera smaller cutting capacity must be used or theaccuracyi of thework is'less'ened; J 7

The invention. providesta knee and column machinei'of: large cutting capacity'wh'ich enables 'heavy:.work to be'oizv'erated with'the greatest accuracy. This is obtainedby' theiknee being guided or supportedon one or both of the sides parallel to the cutting spindle by guides connected withthe base platejor the column'or with both these members.

: The invention is represented in theaccompanying drawings in several examples;

Figs. 1 andt2; are respectively aside view and a" plan of a knee and column milling machine;

Figs. Brand 4' are correspondingviews of a1 modified'construction;

. j y Figs; 5 andSand Figs; 7:and.8,'are correspond;

ing views of other modifications.

- Intheconstruction shownin Figs. 1 and 2 the knee I is provided on both sides with lateral arms or bracing member's} whichen'gage with guides 5 on the sides of and running on and in the direction' of the column 2; A- tight guiding and supporting of the arms: 4:atthe column-:2 is effected screws 6, the heads I of which engage distortions. The pillar I0 is guided inabearing I2 ottheknee'l and a bearing I3 oi the overarm' II I If the knee is not required to move vertically, the' pillar- I b oanfbeconnected rigidly 'with the knee I and the upperarm II'by clamping the guides I2, I3 by means of screws I4, I5.

If the pillar'iil has to be moved out of the way for mounting or operating on massive work, it can be displacedupwards or downwards in theguides 12 or IS without being removed from the machine. Thevertical displacement of the pillar 18 can be effected by gearing IE, ll, [8. I

In the example shown in Figs. 3 and 4, lateral bracing arms 2| are arranged at one end on the column 2 and grooves 39 are provided on the other endof each arm 2|; Guides 22- on both sides of the knee I engage with the grooves 39 for guiding and supporting the knee I at the arms ZI relative to the column 2.

The arms 2I can be cast on the column 2or constructed as separate parts and secured inany suitable manner to thecolumn. If the arms 2| are removable from the column'Z, the machine "can be delivered, according to the requirements of the order received, with or without lateral bracing arms. r

In order to make the guiding and'sup'porting of. the knee I still more rigid, the arms 2I can be connected with the base plate 23 and secured by screws 24 or other fastening devices as shown in the drawings.

Figs. 5 and 6 show a construction generally similar to that of Figs." 3 and 4. Guides 22a are provided on the freeends of the lateral brac ing arms-2i and engage in grooves 39a of the knee I on both its sides running in the direction on the column 2. f 'The knee can be supported more particularly against forces and displacements in the horizontal plane, as shown in Figs; '7 and 8, by the knee being connected with the column? by rods 25 pivoted on the column and adjustably connected to the knee in sleeves 26. After the knee I is ad-' ju'sted to the required height, the rods 25 can be clamped in the sleeves 26 by handles Z'Iand provide alateral support between the knee and the column. .The arrangement can, obviously, be effected conversely, the rods 25 being pivoted on the knee and adjustably mounted and clamped on the column.

It is preferable to use the: lateral guides 5 or 22 in conjunction with thetusual kneeguide 3 provided'on the front side of the column 2 and on. the side of the knee I turned towards the column .2. However,.it is within the scope of. the

I the column to the knee for effecting the different movements of the knee I itself or the cross slide 40 and the work table M which are carried by the knee I, by a shaft provided with Cardan joints and arranged at one side of the column and the knee, other means must be provided in this case, since this space is taken up by the arms 4, 2|. By a suitable construction of the arms 2|, this gearing for the automatic movements of the knee I, the cross slide 40 or the table M, can be arranged between the arms 2 I. In a preferred arrangement these movements are effected by a vertical shaft 35 (Figs. 4 and 6) arranged below the knee l and coupled with the driving gear 36 of the machine. The power is transmitted from the vertical shaft 35 on the knee I by a gear wheel 31 which is displaceable on the shaft 35, and by other transmitting members, not shown on the drawings. The vertical shaft 35 also may be arranged by the side of the knee I between the same and one of the lateral bracing arms 4 or 2|.

I claim:-.

1 1. A machine tool or the like, particularly a milling machine, comprising a column, a. knee carried by the column and movable in a vertical direction along the column, a bracing arm attached at one end at the side of the knee and at its other end at the side of the column, one end of the bracing arm sliding at its point of attachment during the vertical movement of the knee, clamping means for clamping the slidably attached end of the bracing arm during the standstill of the knee, and a pair of guide-faces arranged at the slidably attached end of the bracing arm for guiding and securing the knee during its vertical movement against stresses both in the direction of pressing the bracing arm against the point of attachment and in the direction of lifting the bracing arm therefrom, said guide-faces being fixedly arranged so as to be uninfluenced when loosening the clamping means.

2. A machine tool according to claim 1, in which the bracing arm is in the form of a rod rotatably connected to the column and adjustably connected to the knee by means of a tightening sleeve.

3. A machine tool according to claim 1, in which an overarm is provided on the column, and a vertical pillar is also provided connecting the knee and the overarm.

4. A machine tool according to claim 1, in which a base plate is provided and means are included for rigidly connecting the bracing arms with the base plate.

5. A machine tool or the like, particularly a milling machine, comprising a column, a knee carried by the column and movable in a vertical direction along the column, a pair of bracing arms each attached at one end at the side of the knee and at its other end at the side of the colunm, one end of each bracing arm sliding at its point of attachment during the vertical movement of the knee, clamping means for each bracing .ar nior clamping the slidably attached end of each bracing arm during the standstill of the knee, and a pair of guide-faces for each bracing arm arranged at the slidably attached end of the bracing arm for guiding and securing the knee during its vertical movement against stresses both in the direction of pressing of the bracing arm against the point of attachment and in the direction of lifting the bracing arm therefrom, said guide-faces being fixedly arranged so as to be uninfluenced when loosening the clamping means.

6. A machine tool according to claim 5 in which the bracing arms are in the form of rods rotatably connected to the column and adjustably con nected to the knee by means of a tightening sleeve.

7. A machine tool according to claim 5, in which an overarm is provided on the column, a vertical pillar is provided connecting the knee andthe overarm, and means are included for guiding and supporting the knee at the overarm by said pillar in each position and during the movement of the knee.

8. A machine tool according to claim 5, in which a base plate is provided and means are included for rigidly connecting the bracing arms with the base plate.

9. A machine tool or the like, particularly a milling machine, comprising a column, a knee carried by the column and movable in a vertical direction along the column, a bracing arm arranged at each side of theknee and the column, said-bracing arms being attached at one end to the knee and at the other end to the column and having guides at one end for securing and guiding the bracing arms at their points of attachment during the vertical movement of the knee both in the direction of pressing the bracing arms against the points of attachment and in the direction of lifting the bracing arms therefrom, an overarm provided on the column, a vertical pillar connecting the knee to the overarm, and means for guiding and supporting the knee at the overarm by said pillar in each position and during the movement of the knee.

10. A machine tool or the like, particularly a milling machine, comprising a column, a knee carried by the column and movable in a vertical direction along the column, bracing arms secured at one end to the column, one on each side thereof, and a guide provided on each side of the knee and having a groove therein, the other ends of the bracing arms being adjustably secured in said grooves to guide and support the knee relatively to the column during the movement of the knee.

11. A machine tool or the like, particularly a milling machine, comprising a column, a knee carried by the column and movable in a vertical direction along the column, bracing arms arranged at the knee, one on each side thereof running in the direction of the column, means for guiding and supporting the knee during its movement on the column by the bracing arms against stresses in all directions, a guide for the knee arranged at the front side of the column, and means for adjusting said lateral guiding and supportingmeans relative to said front side guide.

12. A machine tool or the like, particularly a milling machine, comprising a column, a. knee carried'by the column and movable in a vertical direction along the column, bracing arms secured at one end to the column, one on each side thereof, a guide provided on each side of the knee, and grooveson the other ends of the bracing arms, said guides engaging with said grooves to guide ing the movement of the knee.

13. A machine tool or the like, particularly a milling machine, comprising a column, a knee carried by the columnand movable in a vertical direction along the column, and a bracing arm" I 10 having guides at one end for securingand guid- 3 ing the bracing arms at their points of attachment during the vertical movement of the knee both in the direction of pressing the bracing arms against the points of attachment and in the direction of lifting the bracing arms therefrom, and

said bracing arms being in the form of rods rotatably connected to the column and adjustably connected to the knee by means'of a tightening sleeve.

RICHARD STUHLMACHERQ 

